Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Abdelmoneim, Alhoda; Naji, Ahmed; Wagenaars, E.; Abukhadra, Mostafa R.

doi:10.1016/j.ijhydene.2021.01.113

Cited by 26 publications

(11 citation statements)

References 103 publications

(108 reference statements)

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“…This behavior is consistent with the previously reported studies (Li et al, 2019). The strong absorption in the Visible/IR region and the extension of the bandgap edges are very important for solar energy applications, especially photoelectrochemical hydrogen generation and solar cells (Abdelmoneim et al, 2021;Mohamed et al, 2021;Shaban et al, 2021). Urbach energy (E U ) refers to the disorder in the material and represents the width of the exponential absorption edge Urbach tail of the valence and conduction bands (El Sayed and Shaban, 2015).…”

Section: Optical Spectra and Energy Gap Calculationsupporting

confidence: 91%

Synthesis, Mesomorphic, and Solar Energy Characterizations of New Non-Symmetrical Schiff Base Systems

et al. 2021

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New asymmetrical Schiff base series based on lateral methoxy group in a central core, (E)-3-methoxy-4-(((4-methoxyphenyl)imino)methyl)phenyl 4-alkoxybenzoate (An), were synthesized and their optical and mesomorphic characteristics were investigated. The lateral OCH3group was inserted in the central ring in ortho position with respect to the azomethine linkage. FT-IR, and NMR spectroscopy as well as elemental analyses were used to elucidate their molecular structures. Their mesomorphic behaviors were characterized by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). These examinations indicated that all the designed series were monomorphic and possessed nematic (N) mesophase enantiotropically, except A12 derivative which exhibited monotropic N phase. A comparative study was made between the present investigated series (An) and their corresponding isomers (Bn). The results revealed that the kind and stability of the mesophase as well as its temperature range are affected by the location and special orientation of the lateral methoxy group electric-resistance, conductance, energy-gap, and Urbach-energy were also reported for the present investigated An series. These results revealed that all electrodes exhibit Ohmic properties and electric-resistances in the GΩ range, whereas the electric resistance was decreased from 221.04 to 44.83 GΩ by lengthening the terminal alkoxy-chain to n = 12. The band gap of the An series was reduced from 3.43 to 2.89 eV by increasing the terminal chain length from n = 6 to n = 12 carbons. Therefore, controlling the length of the terminal chain can be used to improve the An series’ electric conductivity and optical absorption, making it suitable for solar energy applications.

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Section: Optical Spectra and Energy Gap Calculationsupporting

confidence: 91%

Synthesis, Mesomorphic, and Solar Energy Characterizations of New Non-Symmetrical Schiff Base Systems

et al. 2021

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“…The photo carriers gathered per incident photon flux at a specific wavelength are represented as an incident photon to current conversion efficiency (IPCE%) or external quantum efficiency. IPCE% for the 50 W sample was calculated at various wavelengths and a constant applied voltage of −0.4V using equation (6). ´/ / / where λ stands the wavelength in nm, p signifies the power density (100 mWcm −2 ) for the illuminating light, and J ph is the photo-current density in (mA/cm 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…This process involves the utilization of a semiconductor/electrolyte junction in conjunction with solar energy to drive the water splitting reaction. It needs a semiconductor material that is chemically stable and has an appropriate bandgap for absorbing solar light [5,6]. Metal oxides, sulfides, selenides, tellurides, and nitrides are only a few examples of the many types of semiconductor materials that exhibit a photoresponse to the PEC-water splitting process including ZnO, TiO 2 , CuO, MgO, Cu 2 O, ZnS, CdS, NiO, and GaN [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the solar hydrogen generation performance of nickel-oxide nanostructured thin films doped with molybdenum

Abdelmoneim,

Abdel-wahab,

Elfayoumi

et al. 2024

Phys. Scr.

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Utilizing technology to generate hydrogen (H2) solar energy on a scale corresponding to global energy use is a viable approach to relieve the environmental deterioration and address the energy crisis. This research deals with the manufacture of thin films prepared from nickel oxide (NiO) and their use in the photoelectrochemical water-splitting (PEC-WS) application to yield green H2 as a clean energy fuel. Herein, thin films of (molybdenum) Mo-doped and pure samples from NiO were successfully prepared using a straightforward sputtering method at different radio frequency (RF) power for the dopant Mo target from 0 to 50 watt. X-ray diffraction (XRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and UV-Vis spectroscopy techniques were used to analyze the structural, morphological, chemical composition, and optical characterization of all the prepared films. The PEC-WS behaviors for green H2production and the impedance spectroscopy measurements were also investigated for all samples. In PEC measurements, the 50 W sample showed the highest PEC-WS performance. At -0.4V vs. RHE, the 50 W sample verified the highest value for the photocurrent density of about 1.7 mA which was approximately four times more than the pure NiO sample. The applied

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“…This behavior is consistent with the previously reported studies (Mullekom van, 2000). The reduction in the bandgap is very important for solar energy applications, especially photoelectrochemical hydrogen generation and solar cells (Abdelmoneim et al, 2021;Mohamed et al, 2021;Shaban et al, 2021). Urbach energy (E U ) referred to the width of the exponential absorption edge (the Urbach tail).…”

Section: Optical Spectra and Energy Gap Calculationmentioning

confidence: 99%

Synthesis and Mesomorphic and Electrical Investigations of New Furan Liquid Crystal Derivatives

et al. 2021

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New homologues set liquid crystalline materials, based on furfural derivatives, namely, (E)-4-((furan-2-ylmethylene)amino)phenyl 4-alkoxybenzoate (Fn), were synthesized and investigated for their mesomorphic and optical characteristics. The prepared homologues series constitutes three derivatives that bear different terminal flexible alkyl chain lengths that vary between 6 and 12 carbons and attached to the phenyl ring linked to the ester group. A furfural moiety is introduced into the other terminal of the molecular structure. Mesomorphic characterizations of the prepared derivatives were measured using differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Molecular structures were elucidated via elemental analyses, FTIR, and NMR spectroscopy. DSC and POM showed that all the synthesized furfural derivatives are purely nematogenic, exhibiting an enantiotropic nematic (N) mesophase, except for the longest chain derivative (F12) that is dimorphic possessing a monotropic smectic A phase and an enantiotropic N mesophase. Results indicated that the incorporation of the heterocyclic furfural ring into the molecular skeleton affected both the mesophase range and stability of investigated homologue. Analysis of the optical properties revealed that the shortest chain compound (F6) possesses two direct band gaps, at 2.73 and 3.64 eV, in addition to higher absorption than the higher homologues, F10 and F12. On the other hand, all the synthesized homologues (Fn) showed Ohmic behaviors, with electric resistances in the GΩ range. The values of the electrical resistances are 103.71, 12.91, and 196.85 GΩ at 0.05 V for F6, F10, and F12, respectively.

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Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Cited by 26 publications

References 103 publications

Synthesis, Mesomorphic, and Solar Energy Characterizations of New Non-Symmetrical Schiff Base Systems

Synthesis, Mesomorphic, and Solar Energy Characterizations of New Non-Symmetrical Schiff Base Systems

Enhancing the solar hydrogen generation performance of nickel-oxide nanostructured thin films doped with molybdenum

Synthesis and Mesomorphic and Electrical Investigations of New Furan Liquid Crystal Derivatives

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